Ewan hated episode 1 and 2 but said the 3 one was good.

I disagree but that is his opinion.

The third could have been good without overacting by the Emperor, make the duel less ridiculous on mustafar and make the turn to the darkside make sense.

Also if you did not have a sense of them ticking things off on a list to connect it to the original trilogy as if paint by numbers, they could have still linked them in an interesting way by being more subtle. The only thing i think was done well was when the helmet comes down on Anakin and He is Masked as Vader. And the sunset on tatooine. The Frankenstein scene was horrible, we did not have to see Yoda land on dagobah it could have been implied.